import numpy as np

a = np.array([1,2,3,4,5,6,7,8,9,10,11,12])
b = np.array([[1,2,3],[4,5,6],[7,8,9]])

print(a[[1,3,4,6,7]])
print(a[[1,3,4,6,7]])
print(b[[0,2]])






